github.com/ConsenSys/Quorum@v20.10.0+incompatible/consensus/istanbul/validator/validator.go (about)

     1  // Copyright 2017 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package validator
    18  
    19  import (
    20  	"github.com/ethereum/go-ethereum/common"
    21  	"github.com/ethereum/go-ethereum/consensus/istanbul"
    22  )
    23  
    24  func New(addr common.Address) istanbul.Validator {
    25  	return &defaultValidator{
    26  		address: addr,
    27  	}
    28  }
    29  
    30  func NewSet(addrs []common.Address, policy istanbul.ProposerPolicy) istanbul.ValidatorSet {
    31  	return newDefaultSet(addrs, policy)
    32  }
    33  
    34  func ExtractValidators(extraData []byte) []common.Address {
    35  	// get the validator addresses
    36  	addrs := make([]common.Address, (len(extraData) / common.AddressLength))
    37  	for i := 0; i < len(addrs); i++ {
    38  		copy(addrs[i][:], extraData[i*common.AddressLength:])
    39  	}
    40  
    41  	return addrs
    42  }
    43  
    44  // Check whether the extraData is presented in prescribed form
    45  func ValidExtraData(extraData []byte) bool {
    46  	return len(extraData)%common.AddressLength == 0
    47  }